Login

Welcome, Guest. Please login or register.

March 28, 2024, 10:16:26 pm

Author Topic: VCAA Sample Exam (2017) Solutions  (Read 39393 times)  Share 

0 Members and 1 Guest are viewing this topic.

vox nihili

  • National Moderator
  • Great Wonder of ATAR Notes
  • *****
  • Posts: 5343
  • Respect: +1447
Re: VCAA Sample Exam (2017) Solutions
« Reply #30 on: October 27, 2017, 01:29:03 pm »
+2
Agreed that you would probably be rewarded either way, as long as you justified it. Said this previously on AN somewhere.

Edrolo’s reasoning is wrong. Their argument for averaging is that you combine data sets. Each data set is inherently prone to error; therefore, each one gives a fairly inaccurate view of what’s going on, on its own. However, what EdRolo have failed to recognise in presenting the raw data is that you don’t consider an individual data set. You consider multiple data sets together. By taking the average you hide important information, namely that 3/4 showed the change we expected, whereas 1 appears to have been subject to an experimental error.

The average leads us to the wrong conclusion. The raw data do not.
This is always the case. The average is only a narrow snapshot of raw data. The raw data will ALWAYS be more instructive. For someone looking at the raw data, if they want to know the average they can calculate it themselves. You can’t derive the raw data from an average though.
2013-15: BBiomed (Biochemistry and Molecular Biology), UniMelb
2016-20: MD, UniMelb
2019-20: MPH, UniMelb
2021-: GDipBiostat, USyd

LifeisaConstantStruggle

  • Forum Obsessive
  • ***
  • Posts: 324
  • Respect: +104
Re: VCAA Sample Exam (2017) Solutions
« Reply #31 on: October 28, 2017, 10:14:57 am »
+3
here are the solutions for MCQs.
2018-2020: Bachelor of Actuarial Science (+ Econometrics), Monash
2021: Bachelor of Commerce (Honours), Econometrics & Financial Mathematics, Monash
2022-2023: Work and some soul-searching

LifeisaConstantStruggle

  • Forum Obsessive
  • ***
  • Posts: 324
  • Respect: +104
Re: VCAA Sample Exam (2017) Solutions
« Reply #32 on: October 28, 2017, 11:11:20 am »
+3
Here are the solutions for the short answer section. I've only included the initials of my teacher (and surname) as she does not want to be explicitly named.
2018-2020: Bachelor of Actuarial Science (+ Econometrics), Monash
2021: Bachelor of Commerce (Honours), Econometrics & Financial Mathematics, Monash
2022-2023: Work and some soul-searching

parharjasmine

  • Fresh Poster
  • *
  • Posts: 2
  • Respect: 0
Re: VCAA Sample Exam (2017) Solutions
« Reply #33 on: October 29, 2017, 11:10:42 am »
0
Hello,

I don't seem to understand why the answer to 1)c is CO2 consumption? Isn't CO2 in fact released?

Thank you :)

LifeisaConstantStruggle

  • Forum Obsessive
  • ***
  • Posts: 324
  • Respect: +104
Re: VCAA Sample Exam (2017) Solutions
« Reply #34 on: October 29, 2017, 11:23:06 am »
+1
Hello,

I don't seem to understand why the answer to 1)c is CO2 consumption? Isn't CO2 in fact released?

Thank you :)
Ah yes I have noticed this in the sample exam solutions as well. But I have changed it to CO2 levels instead of consumption in the solutions I have edited. So yeah :) sorry for not stating it here.

Also, it's better to talk about any "change" in the level of substance we want to talk about because, we wouldn't know if the CO2 level has increased or decreased without any prior knowledge to the experiment.
« Last Edit: October 29, 2017, 11:26:14 am by LifeisaConstantStruggle »
2018-2020: Bachelor of Actuarial Science (+ Econometrics), Monash
2021: Bachelor of Commerce (Honours), Econometrics & Financial Mathematics, Monash
2022-2023: Work and some soul-searching

vox nihili

  • National Moderator
  • Great Wonder of ATAR Notes
  • *****
  • Posts: 5343
  • Respect: +1447
Re: VCAA Sample Exam (2017) Solutions
« Reply #35 on: October 29, 2017, 01:58:46 pm »
0

Hello,

I don't seem to understand why the answer to 1)c is CO2 consumption? Isn't CO2 in fact released?

Thank you :)

I’ll change it when I get onto a computer, thank you :)

During my holidays I’ll probably try to clean up these sample answers. As I’ve mentioned, I only had about 20 minutes to do them so there are silly errors like that :) 
2013-15: BBiomed (Biochemistry and Molecular Biology), UniMelb
2016-20: MD, UniMelb
2019-20: MPH, UniMelb
2021-: GDipBiostat, USyd

Kateblain

  • Fresh Poster
  • *
  • Posts: 1
  • Respect: 0
Re: VCAA Sample Exam (2017) Solutions
« Reply #36 on: October 29, 2017, 07:11:50 pm »
0
Hi, just wanted to ask about question 6b: why is the mRNA strand complementary to the DNA strand? Shouldn't it be the same (with U replacing T)?

LifeisaConstantStruggle

  • Forum Obsessive
  • ***
  • Posts: 324
  • Respect: +104
Re: VCAA Sample Exam (2017) Solutions
« Reply #37 on: October 29, 2017, 07:19:10 pm »
0
As you can see in the question, the table above is a codon table, and codons are complementary to the DNA template strand shown in the question.
They did not word this well enough tbh, could've specified the type of DNA strand shown (template or coding).
2018-2020: Bachelor of Actuarial Science (+ Econometrics), Monash
2021: Bachelor of Commerce (Honours), Econometrics & Financial Mathematics, Monash
2022-2023: Work and some soul-searching

PhoenixxFire

  • VIC MVP - 2018
  • Honorary Moderator
  • ATAR Notes Legend
  • *******
  • Posts: 3695
  • They/them/theirs
  • Respect: +3102
Re: VCAA Sample Exam (2017) Solutions
« Reply #38 on: October 29, 2017, 07:47:21 pm »
0
Hi, just wanted to ask about question 6b: why is the mRNA strand complementary to the DNA strand? Shouldn't it be the same (with U replacing T)?
Not sure but the way you've worded this makes it sound like you think the mRNA strand is a copy of the template strand which is not the case. During transcription RNA polymerase builds a strand complementary to the template strand.
2019: B. Environment and Sustainability/B. Science @ ANU
2020: Just Vibing
2021: B. Paramedicine/B. Nursing @ ACU Canberra

neenah

  • Adventurer
  • *
  • Posts: 15
  • Respect: 0
Re: VCAA Sample Exam (2017) Solutions
« Reply #39 on: October 29, 2017, 09:54:48 pm »
0
Hey can I just ask why in MCQ 14 A is more correct than D?

vox nihili

  • National Moderator
  • Great Wonder of ATAR Notes
  • *****
  • Posts: 5343
  • Respect: +1447
Re: VCAA Sample Exam (2017) Solutions
« Reply #40 on: October 29, 2017, 10:11:11 pm »
0
Hey can I just ask why in MCQ 14 A is more correct than D?

D is incorrect because photosynthesis starts when there's any light at all (x-axis). The y-axis just tells you about NET energy production. Below 0, the production is in the negative because the plant cells are using more energy in respiration than they're producing in photosynthesis. They are still producing energy by photosynthesis though even when it's in the negative!
2013-15: BBiomed (Biochemistry and Molecular Biology), UniMelb
2016-20: MD, UniMelb
2019-20: MPH, UniMelb
2021-: GDipBiostat, USyd

zenith101

  • Trailblazer
  • *
  • Posts: 36
  • Respect: 0
Re: VCAA Sample Exam (2017) Solutions
« Reply #41 on: October 30, 2017, 03:31:44 pm »
0
hey there,

for question 1 c i) should the answer be production of CO2, rather than consumption?. If not, why so, i'm a bit lost.

Also for q1 c)ii) would writing 'increasing temperature to allow optimal enzyme activity' be an acceptable answer?

Thanks

vox nihili

  • National Moderator
  • Great Wonder of ATAR Notes
  • *****
  • Posts: 5343
  • Respect: +1447
Re: VCAA Sample Exam (2017) Solutions
« Reply #42 on: October 30, 2017, 03:46:12 pm »
0
hey there,

for question 1 c i) should the answer be production of CO2, rather than consumption?. If not, why so, i'm a bit lost.

Also for q1 c)ii) would writing 'increasing temperature to allow optimal enzyme activity' be an acceptable answer?

Thanks


We addressed this a few posts above. Sorry about the confusion.

Yes. Although I wouldn't assume that an increase is needed to reach optimal temperature; it could be a decrease. Changing the temperature would suffice :)
2013-15: BBiomed (Biochemistry and Molecular Biology), UniMelb
2016-20: MD, UniMelb
2019-20: MPH, UniMelb
2021-: GDipBiostat, USyd

banksduyvu

  • Fresh Poster
  • *
  • Posts: 4
  • Respect: 0
Re: VCAA Sample Exam (2017) Solutions
« Reply #43 on: November 01, 2017, 06:13:18 pm »
0
Why does cell burst causes inflammation? :))

vox nihili

  • National Moderator
  • Great Wonder of ATAR Notes
  • *****
  • Posts: 5343
  • Respect: +1447
Re: VCAA Sample Exam (2017) Solutions
« Reply #44 on: November 01, 2017, 06:50:08 pm »
0

Why does cell burst causes inflammation? :))

Cells of the immune system, which drive inflammation, respond to bits of dead cell. When cells burst, dead bits of cell go flying everywhere triggering inflammation.
2013-15: BBiomed (Biochemistry and Molecular Biology), UniMelb
2016-20: MD, UniMelb
2019-20: MPH, UniMelb
2021-: GDipBiostat, USyd